EP1745971A2 - Entlüftungseinrichtung eines Kraftstofftanks - Google Patents
Entlüftungseinrichtung eines Kraftstofftanks Download PDFInfo
- Publication number
- EP1745971A2 EP1745971A2 EP06013573A EP06013573A EP1745971A2 EP 1745971 A2 EP1745971 A2 EP 1745971A2 EP 06013573 A EP06013573 A EP 06013573A EP 06013573 A EP06013573 A EP 06013573A EP 1745971 A2 EP1745971 A2 EP 1745971A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- fuel tank
- fuel
- vent tube
- baffle
- vent
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
- B60K15/03—Fuel tanks
- B60K15/035—Fuel tanks characterised by venting means
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01D—HARVESTING; MOWING
- A01D34/00—Mowers; Mowing apparatus of harvesters
- A01D34/01—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus
- A01D34/412—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters
- A01D34/63—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters having cutters rotating about a vertical axis
- A01D34/82—Other details
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
- B60K15/03—Fuel tanks
- B60K15/077—Fuel tanks with means modifying or controlling distribution or motion of fuel, e.g. to prevent noise, surge, splash or fuel starvation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M25/00—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture
- F02M25/08—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture adding fuel vapours drawn from engine fuel reservoir
- F02M25/0872—Details of the fuel vapour pipes or conduits
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
- B60K15/03—Fuel tanks
- B60K2015/03111—Swirl pots
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
- B60K15/03—Fuel tanks
- B60K2015/03236—Fuel tanks characterised by special filters, the mounting thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
- B60K15/03—Fuel tanks
- B60K2015/03328—Arrangements or special measures related to fuel tanks or fuel handling
- B60K2015/0344—Arrangements or special measures related to fuel tanks or fuel handling comprising baffles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
- B60K15/03—Fuel tanks
- B60K15/035—Fuel tanks characterised by venting means
- B60K2015/03523—Arrangements of the venting tube
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
- B60K15/03—Fuel tanks
- B60K15/035—Fuel tanks characterised by venting means
- B60K2015/03542—Mounting of the venting means
- B60K2015/03547—Mounting of the venting means the venting means are integrated in the fuel cap or inlet cover
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
- B60Y2200/00—Type of vehicle
- B60Y2200/20—Off-Road Vehicles
- B60Y2200/22—Agricultural vehicles
- B60Y2200/225—Walk behind vehicles, e.g. motorized wheel barrows
Definitions
- the present invention relates to small internal combustion engines of the type which are used with lawnmowers, lawn and garden tractors, other utility implements such as snow throwers and generators, and in sport vehicles, for example.
- the present invention relates to an arrangement for venting the fuel tanks of such engines.
- Small internal combustion engines include fuel tanks for storing liquid fuel which is mixed with air in the carburetor of the engine to provide a fuel/air mixture for combustion within the engine.
- the fuel tank is made from metal or from an injection-molded plastic, for example, and is mounted toward the upper portion of the engine such that the liquid fuel within the tank may flow by gravity into the fuel bowl of the carburetor.
- the carburetor includes a float-type valve assembly for metering a supply of liquid fuel from the fuel tank into the carburetor float bowl.
- One known fuel tank is made from an injection-molded plastic, and includes a metal vent tube disposed within the interior of the fuel tank.
- the lower end of the metal tube is bonded to a metal fitting which is threaded into internal threads of a boss which is molded within the lower wall of the fuel tank.
- the upper end of the metal vent tube is disposed within a baffle wall formed in the top wall of the fuel tank to prevent liquid fuel from being splashed into the upper end of the vent tube, and a conduit is attached to the metal fitting at the lower end of the vent tube.
- vapors within the fuel tank may pass into the space within the baffle wall, into the upper end of the vent tube, and thence downwardly through the vent tube, the fitting, and the conduit to be vented externally of the fuel tank.
- a problem with the foregoing arrangement is that the threaded connection between the metal vent tube fitting and the plastic threads of the fuel tank boss may not be sufficiently durable, and could be prone to eventual leakage due to engine vibrations or other external forces, for example. Also, the foregoing arrangement requires several parts in addition to the fuel tank itself, such as the metal vent tube and the metal fitting, which add manufacturing steps and additional cost to production of the fuel tank.
- the present invention provides a fuel tank for small internal combustion engines, the fuel tank formed of a pair of lower and upper housing members which are molded from a plastic material and are sealed to one another via heat welding, for example, to define the interior volume of the fuel tank.
- the lower housing member includes an integral vent tube which extends substantially upwardly within the interior of the fuel tank and includes an open end.
- the upper housing member includes an integral baffle wall projecting downwardly therefrom which defines a baffle chamber in which the upper end of the vent tube is received.
- the lower housing member additionally includes an integral fitting to which a vent conduit is attached, the fitting in fluid communication with the vent tube. In use, fuel vapors are vented from the fuel tank by passing into the baffle chamber and thence into the open end of the vent tube and through the fitting and vent conduit to a carbon canister or other containment device.
- the fitting of the lower housing member may be provided within a recessed area of the lower housing member such that the connection of the vent conduit to the fitting is hidden from view and protected against external contacts which could potentially disconnect the hose from the fitting.
- the lower housing member may include an additional recessed groove for receipt of the vent conduit.
- the filler neck of the fuel tank is integrally formed with the upper housing member and extends downwardly within the interior volume of the fuel tank such that, when fuel is filled into the fuel tank, a vapor space is defined in the upper portion of the fuel tank in which fuel vapors may collect and thence be vented from the fuel tank.
- vent tube and fitting are each integrally formed with the lower housing member, and the baffle wall and filler neck are integrally formed with the upper housing member, thereby reducing the cost of production of the fuel tank and eliminating the need for a plurality of separate components associated with the venting arrangement, such as separate vent tubes and fittings.
- the present invention provides a fuel tank, including at least two housing members joined to one another to define an interior volume therebeween; and an elongated vent tube monolithically formed with one of the housing members and extending therefrom within the interior volume.
- the present invention provides a fuel tank, including at least two housing members joined to one another to define an interior volume therebeween; an elongated vent tube connected to one of the housing members and extending therefrom within the interior volume; and a fuel blocking element disposed within the vent tube and extending within the vent tube along a substantial portion of a length of the vent tube, wherein the fuel blocking element substantially blocks the passage of liquid fuel therethrough into the vent tube and allows the passage therethrough of gaseous fuel vapors when pressure in the fuel tank rises above atmospheric pressure.
- Fig. 1 is a perspective view of an exemplary implement, shown herein as a lawnmower, which includes a small internal combustion engine with which the fuel tank of the present invention may be used;
- Fig. 2 is a perspective top view of the fuel tank
- Fig. 3 is a perspective bottom view of the fuel tank
- Fig. 4 is a sectional view through the fuel tank, taken along line 4-4 of Fig. 2;
- Fig. 5 is a fragmentary view of a portion of the fuel tank of Fig. 4, showing agitation of the fuel within the fuel tank;
- Fig. 6 is a fragmentary view of a portion of the fuel tank of Fig. 4, showing a one-way valve integrated into the fuel tank cap;
- Fig. 7 is a sectional view of a fuel tank in accordance with another embodiment, showing the fuel tank in an upright orientation
- Fig. 8 is a sectional view of a fuel tank in accordance with another embodiment, showing the fuel tank in an inverted orientation.
- lawnmower 10 generally includes deck 12 having wheels 14, and handle 16 extending upwardly from deck 12 to allow lawnmower 10 to be moved about by an operator. Additionally, lawnmower 10 includes a small one or two cylinder internal combustion engine 18, which may be of the side valve or L-head type, the overhead valve (“OHV”) type, or the overhead cam (“OHC”) type, such as engines currently manufactured by Tecumseh Products Company of Grafton and New Holstein, Wisconsin.
- a small one or two cylinder internal combustion engine 18 which may be of the side valve or L-head type, the overhead valve (“OHV”) type, or the overhead cam (“OHC”) type, such as engines currently manufactured by Tecumseh Products Company of Grafton and New Holstein, Wisconsin.
- engine 18 includes a carburetor 20 for providing a fuel/air mixture for combustion within engine 18 to drive the piston/connecting rod/crankshaft assembly (not shown) of engine 18 to rotate a cutting blade (not shown) beneath deck 12 of lawnmower 10.
- Engine 18 additionally includes fuel tank 22 mounted thereto for storing a volume of liquid fuel which is supplied to fuel bowl 24 of carburetor 20 in the manner described below.
- carburetor 20 includes a float-type valve (not shown) within fuel bowl 24 to meter a supply of liquid fuel from fuel tank 22 into fuel bowl 24.
- Carburetor 20 may be of the type disclosed in U.S. Patent Nos. 6,152,431 , 6,499,726 , and 6,513,794 , each assigned to the assignee of the present invention, the disclosures of which are incorporated herein by reference.
- fuel tank 22 generally includes lower housing member 26 and upper housing member 28.
- Lower housing member 26 and upper housing member 28 are each single, monolithic components including the various features described below, and which may each be formed from an injection-molded plastic, such as polyethylene, for example.
- Lower housing member 26 and upper housing member 28 include mutually facing outer rim surfaces 30 and 32, respectively, which are in abutment with one another and are secured to one another via heat welding, for example, to define an interior volume 34 within fuel tank 22.
- outer rim surfaces 30 and 32 may include suitable overlapping and/or interlocking features.
- fuel tank 22 is shown and described herein as including lower and upper housing members 26 and 28 joined to one another along a substantially horizontal interface, fuel tank 22 could also be formed from left and right housing members joined along a substantially vertical interface, for example, or may be formed from any two or more housing members which may be joined along an interface which is disposed at an angle with respect to horizontal and vertical.
- Upper housing member 28 generally includes top wall 36 with side wall 38 depending therefrom. Upper housing member 28 also includes filler neck 38 integrally/monolithically formed therewith which is cylindrically-shaped and, as shown in Fig. 4, includes an upper, threaded portion 40 disposed externally of fuel tank 22 within a recess 42 defined within top wall 36. Recess 42 includes splash guard wall 44 to direct any spilled fuel in a desired direction away from fuel tank 22. Filler neck 38 also includes a lower, baffle portion 46 extending downwardly into interior volume 34 of fuel tank 22.
- Fuel tank cap 50 includes inner threads 52 for threading attachment to outer threads 54 of filler neck 50 to close fuel tank 22, wherein inner threads 52 of fuel tank cap 50 and outer threads 54 of filler neck 38 form a seal therebetween such that fuel vapors within fuel tank 22 cannot escape through the foregoing threads. Additionally, fuel tank cap 50 may optionally include an O-ring or other seal member 55 for providing a seal between fuel tank cap 50 and filler neck 40. Thus, fuel tank cap 50 is of the "non-venting" type in which fuel vapors cannot vent from internally of fuel tank 22 through fuel tank cap 50. In one embodiment, however, fuel tank cap may include a one-way valve as described below with reference to Fig. 6.
- Upper housing member 28 additionally includes a vapor space 56 defined within interior volume 34 of fuel tank 22 above baffle portion 46 of filler neck 40.
- a vapor space 56 defined within interior volume 34 of fuel tank 22 above baffle portion 46 of filler neck 40.
- air is trapped within vapor space 56 when the level of fuel rises to the lower end, or just above the lower end, of baffle portion 46 of filler neck 40.
- the air trapped within vapor space 56 prevents additional fuel from entering vapor space 56, and thereafter, any additional liquid fuel filled into fuel tank 22 rapidly fills up filler neck 40 to indicate to the user that fuel tank 22 is full.
- the level of baffle portion 46 of filler neck 40 defines the maximum fill level for fuel within fuel tank 22.
- Vapor space 56 also provides a volume of air within fuel tank 22 in which vapors from the liquid fuel in fuel tank 22 may collect.
- Upper housing member 28 further includes baffle wall 58 extending therefrom, which is integrally/monolithically formed with upper housing member 28.
- Baffle wall 58 may have a circular, square, or other polygonal shape in cross-section, for example, and generally protrudes downwardly from upper housing member 28 to a form baffle recess or space 60 therein, the function of which is described further below.
- Lower housing member 26 generally includes a lower bottom wall 62, an upper bottom wall 64, an intermediate wall connecting lower and upper bottom walls 62 and 64, and side wall 68.
- Lower bottom wall 62 and side wall 68 define a lowermost portion within interior volume 34 of fuel tank 22.
- Fuel outlet fitting 70 is integrally/monolithically formed within lower bottom wall 62 in fluid communication with the lowermost portion of interior volume 34 of fuel tank 22, and a fuel conduit 72 (Fig. 3) may be attached to fuel outlet fitting 70.
- liquid fuel within fuel tank 22 drains by gravity through fuel outlet fitting 70 and passes through fuel conduit 72 to fuel bowl 24 of carburetor 20.
- Fuel tank 22 may also include a water trap (not shown) and/or a water-repellant screen (not shown) mounted over the interior side of fuel outlet fitting 70 of the type disclosed in U.S. Patent No. 6,953,527 , assigned to the assignee of the present invention, the disclosure of which is incorporated by reference.
- a plurality of brackets 73 may be formed integrally with, or otherwise attached to, lower housing member 26 for mounting fuel tank 22 to engine 20.
- Lower housing member 26 additionally includes a recessed wall 74 projecting inwardly therein to define a concave or recess space 76 in lower housing member 26, as well as vent tube 78 and vent fitting 80 which are each integrally/monolithically formed with lower housing member 26.
- Vent tube 78 is generally elongate in shape, and extends generally upwardly from lower housing member 26 into the interior volume 34 of fuel tank 22 and upwardly into vapor space 56.
- upper end 82 of vent tube 78 is positioned generally within the baffle space 60 which is defined by baffle member 58 of upper housing member 28.
- vent tube 78 typically, upper end 82 of vent tube 78 is disposed above the lower end of baffle member 58, as shown in Fig. 5, such that baffle member 58 prevents fuel from splashing into upper end 82 of vent tube 78 when the fuel in fuel tank 22 is agitated, as discussed below.
- Vent fitting 80 projects into recess space 76 and is in fluid communication with vent tube 78, and also includes at least one, and preferably a plurality of, barbs 84 therealong for press-fit attachment thereto of vent conduit 86.
- vent fitting 80 is advantageously located within recess space 76 of lower housing member 26, such that the connection between vent conduit 86 and vent fitting 80 is hidden from view and is protected against external contacts or jostling which could potentially disengage vent conduit 84 from vent fitting 80.
- lower housing member 26 may also include a recessed groove 88 (Fig. 3) in which vent conduit 86 may be fitted to protect vent conduit 86 from external contacts, for example.
- vent tube 78 and vent fitting 80 are integrally formed with lower housing member 26, thereby obviating the need for additional parts such as a separate vent tube and vent fitting, and also eliminating the need for a connection between a separate vent tube and/or vent fitting with the fuel tank 22 which might be prone to leakage.
- fuel tank 22 After fuel tank 22 is filled with liquid fuel, some of the liquid fuel may vaporize due to heat from engine 10 and/or from warm ambient conditions, and such vapors will collect within vapor space 56 of fuel tank 22. Fuel vapors may enter baffle space 60 and thence may pass into upper end 82 of vent tube 78. Thereafter, the fuel vapors may pass through vent fitting 80 and vent conduit 82 into a carbon canister (not shown) or other containment device, or may be vented directly to the carburetor. Suitable arrangements for collecting and/or disposing of fuel vapors which are vented from fuel tanks are disclosed in U.S. Patent Application Serial No.
- baffle wall 58 advantageously prevents liquid fuel from entering upper end 82 of vent tube 78 by blocking the liquid fuel in the manner illustrated in Fig. 5.
- baffle wall 58 may be elongated, as represented at 58a in Fig. 4, wherein baffle wall 58a extends downwardly from upper wall 36 of fuel tank 22 along a substantial extent of the length of vent tube 78 to further prevent fuel from being splashed into baffle space 60.
- baffle wall 58a may extend to approximately the depth of baffle portion 46 of filler neck 40 to maintain a vapor/air space within baffle space 60 upon filling fuel into tank 22.
- baffle wall 58a may extend beneath the level of fuel in tank 22, baffle wall 58a may include a small vent hole (not shown) near upper wall 36 of fuel tank 22 to allow fuel vapors into baffle space 60 and thence into vent tube 78.
- a fuel blocking element 90 may be positioned within baffle space 60 to prevent the passage of liquid fuel into vent tube 78 when the fuel in fuel tank 22 is agitated and/or when fuel tank 22 is tipped.
- fuel blocking element 90 may be trapped between upper end 82 of vent tube 78, upper wall 36 of fuel tank 22, and baffle wall 58, or fuel blocking element 90 may have an annular shape and may be disposed between upper end 82 of vent tube 78 and baffle wall 58.
- fuel blocking element 90 may be fitted within the open upper end 82 of vent tube 78.
- Fuel blocking element 90 may be made from an open-cell porous material which blocks the passage of liquid fuel therethrough yet allows the passage therethrough of gaseous fuel vapors.
- fuel blocking element 90 may be a foam-type material, or alternatively, may be a porous plastic or porous fiber material of the type available from Porex® Porous Products Group, a division of Porex Corporation of Fairbum, GA. (Porex® is a registered trademark of Porex Technologies Corp.).
- an anti-rollover valve (not shown) may be incorporated into baffle space 60 and/or into the upper end 82 of vent tube 78 to prevent liquid fuel from entering vent tube 78 when fuel tank 22 is tipped, for example.
- One suitable anti-rollover valve is shown and described in the above-incorporated U.S. Patent Application Serial No. 11/062,955 .
- fuel blocking element 90 additionally hinders the passage therethrough of gaseous fuel vapors and air into vent tube 78.
- air is trapped within vapor space 56 when the level of fuel rises to the lower end, or just above the lower end, of baffle portion 46 of filler neck 40.
- the air trapped within vapor space 56 prevents additional fuel from entering vapor space 56, and thereafter, any additional liquid fuel filled into fuel tank 22 rapidly fills up filler neck to indicate to the user that fuel tank 22 is full.
- Vapor space 56 also provides a volume of air within fuel tank 22 in which vapors from the liquid fuel in fuel tank 22 may collect.
- the porous construction of fuel blocking element 90 relieves pressure to atmospheric conditions, whereby gaseous fuel vapors may vent through vent tube 78, vent fitting 80, and vent conduit 82 into a carbon canister (not shown) or other containment device, or may be vent directly to carburetor 20.
- fuel tank cap 50 may optionally include a one-way valve 94 to permit the flow of atmospheric air therethrough into fuel tank 22, as described below.
- Valve 94 may be in the form of a duck-bill or flapper-type valve, for example, including stem portion 96 anchored to fuel tank cap 50 in a suitable manner, and flap portion 98 in sealing engagement with interior wall 100 of fuel tank cap 50 about a passage 102 extending through fuel tank cap 50.
- a porous element (not shown) may be provided within passage 102 to trap particulate materials.
- Fuel tank 104 includes a relatively planar bottom wall as opposed to the stepped configuration of lower bottom wall 62, upper bottom wall 64, and transition wall 66 of fuel tank 22 described above.
- fuel tank 22 may also include a stepped lower wall configuration similar to that of fuel tank 22, if desired.
- Fuel tank 104 includes vent tube 78 having an upper end disposed within baffle space 60 of baffle wall 58 similar to fuel tank 22.
- vent tube 78 of fuel tank 104 includes an elongated porous fuel blocking element 108 disposed therewithin which, as shown in Figs. 7 and 8, may extend from the upper end of vent tube 78 downwardly within vent tube 78 along a substantial portion of the length of vent tube 78.
- Fuel blocking element 108 may be formed of the same or similar materials as fuel blocking element 90 described above. As shown in Fig.
- fuel blocking element 108 includes a conical or sloped upper end portion 110 which may overlap the upper end of vent tube 78 such that any liquid fuel which contacts upper end portion 110 of fuel blocking element 108 will flow back down into the main volume of fuel within fuel tank 104 before a substantial portion of the liquid fuel enters the porous structure of fuel blocking element 108.
- fuel tank 104 is in an upright orientation as shown in Fig. 7.
- fuel blocking element 108 allows the passage of air and fuel vapors therethrough but blocks the passage of liquid fuel through vent tube 78 should any liquid fuel splash upwardly into vent space 60.
- lawnmower 10 or another implement with which engine 18 and fuel tank 22 are used is tipped, such as to an inverted orientation shown in Fig. 8 or to an angled orientation between the upright orientation shown in Fig. 7 and the inverted orientation shown in Fig. 8, the fuel within fuel tank 104 will move by gravity to the upper end of fuel tank 104.
- Fuel blocking element 108 may be configured to extend within vent tube 78 along a significant extent of the length of vent tube 78 to substantially fill the interior of vent tube 78 and to obstruct fuel flow through vent tube 78 such that, as shown in Fig. 8, the amount of fuel that can collect in vent tube is minimized. In this manner, even when fuel tank 104 is inverted, fuel blocking element 108 substantially prevents liquid fuel from passing therethrough through vent tube 78.
- fuel tank 22 or 104 may include a horizontal baffle wall toward the upper portion thereof which includes a plurality of openings therein to allow fuel to be filled into the lower portion of the fuel tank beneath the baffle wall.
- baffle wall would provide an additional barrier against potential splashing of fuel into baffle space 60 and/or vent tube 78.
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Transportation (AREA)
- Environmental Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US70077905P | 2005-07-20 | 2005-07-20 | |
US75850506P | 2006-01-12 | 2006-01-12 |
Publications (2)
Publication Number | Publication Date |
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EP1745971A2 true EP1745971A2 (de) | 2007-01-24 |
EP1745971A3 EP1745971A3 (de) | 2008-03-19 |
Family
ID=37056928
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP06013573A Withdrawn EP1745971A3 (de) | 2005-07-20 | 2006-06-30 | Entlüftungseinrichtung eines Kraftstofftanks |
Country Status (3)
Country | Link |
---|---|
US (1) | US20070017918A1 (de) |
EP (1) | EP1745971A3 (de) |
CA (1) | CA2540943A1 (de) |
Cited By (6)
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JP2013036426A (ja) * | 2011-08-10 | 2013-02-21 | Fuji Heavy Ind Ltd | 燃料タンク及びエンジン |
GB2509382A (en) * | 2012-11-19 | 2014-07-02 | Castrol Ltd | A deflector to obstruct movement of liquid into a valve of a container for a fluid system in a vehicle |
WO2016066545A1 (de) * | 2014-10-31 | 2016-05-06 | Kautex Textron Gmbh & Co. Kg | Betriebsflüssigkeitsbehälter für ein kfz aus thermoplastischem kunststoff |
WO2016184990A1 (fr) * | 2015-05-19 | 2016-11-24 | Plastic Omnium Advanced Innovation And Research | Reservoir a jupe integree |
US20170022859A1 (en) * | 2011-11-03 | 2017-01-26 | Briggs & Stratton Corporation | Vertically storable engine and mower |
US12085216B2 (en) | 2022-02-17 | 2024-09-10 | Arctic Cat Inc. | Multi-use fuel filler tube |
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Publication number | Priority date | Publication date | Assignee | Title |
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SE0403154L (sv) * | 2004-12-21 | 2006-03-28 | Volvo Lastvagnar Ab | Behållare för rinnande material |
US20070068951A1 (en) * | 2005-09-26 | 2007-03-29 | Manngmbh | Reservoir with a channel |
US7854345B2 (en) * | 2006-05-24 | 2010-12-21 | Cnh America Llc | Vehicular fuel tank arrangement |
US20100045017A1 (en) * | 2008-08-19 | 2010-02-25 | Rea James Robert | Tanks and methods of contstructing tanks |
US8038878B2 (en) * | 2008-11-26 | 2011-10-18 | Mann+Hummel Gmbh | Integrated filter system for a coolant reservoir and method |
CN101823425B (zh) * | 2009-01-22 | 2014-05-21 | 麦格纳斯太尔燃油系统公司 | 具有内装件的燃油箱及其制造方法 |
CN101813057B (zh) * | 2010-04-16 | 2013-01-16 | 南京工业大学 | 一种带舱肋的兆瓦级风力叶片 |
US8813780B2 (en) | 2010-10-26 | 2014-08-26 | Schiller Grounds Care, Inc. | Sealed, non-permeable fuel tank for spark-ignition motors |
US9950616B2 (en) | 2010-12-03 | 2018-04-24 | Jeffrey Yager | Deployable fuel tank baffle and fuel tank system |
DE102011122215B4 (de) * | 2011-12-24 | 2021-05-06 | Audi Ag | Kraftstoffbehälter für ein Kraftfahrzeug mit anpassbarem Füllvolumen |
JP6336465B2 (ja) * | 2012-11-19 | 2018-06-06 | カストロール リミテッド | 交換可能な流体容器 |
DE102013113827A1 (de) * | 2013-12-11 | 2015-06-11 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Kraftfahrzeug mit einer Tankentlüftungsvorrichtung |
US9989077B2 (en) * | 2015-05-14 | 2018-06-05 | Elwha Llc | Systems and methods for selective control of fuel tanks |
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JP2017019470A (ja) * | 2015-07-15 | 2017-01-26 | キャタピラー エス エー アール エル | 合成樹脂製タンク |
WO2019117195A1 (ja) * | 2017-12-13 | 2019-06-20 | 住友建機株式会社 | ショベル |
CN112639267B (zh) * | 2018-09-06 | 2022-11-08 | 本田技研工业株式会社 | 工作机械 |
EP3620078B1 (de) * | 2018-09-06 | 2021-10-20 | IHS Global Design Pty Ltd | Klapptisch |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6152431A (en) | 1998-05-06 | 2000-11-28 | Tecumseh Products Company | Carburetor having extended prime |
US6499726B2 (en) | 1999-11-04 | 2002-12-31 | Tecumseh Products Company | Engine having carburetor with bridge circuit |
US20040123846A1 (en) | 2002-09-10 | 2004-07-01 | Rado Gordon E. | Emissions control system for small internal combustion engines |
US20050178368A1 (en) | 2004-02-02 | 2005-08-18 | Donahue Ronald J. | Evaporative emissions control system including a charcoal canister for small internal combustion engines |
US6953527B2 (en) | 2003-02-17 | 2005-10-11 | Tecumseh Products Company | Fuel tank with water trap |
US20050274364A1 (en) | 2004-06-14 | 2005-12-15 | Kirk J D | Evaporative emissions control system for small internal combustion engines |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3910302A (en) * | 1973-12-14 | 1975-10-07 | Chrysler Corp | Roll-over valve and vapor separator |
US4877147A (en) * | 1988-08-01 | 1989-10-31 | Ford Motor Company | Tank comprising embedded flanged conduit |
US4978027A (en) * | 1990-03-28 | 1990-12-18 | The Kelch Corporation | Fuel tank with vent system |
FR2774949B1 (fr) * | 1998-02-19 | 2000-05-05 | Plastic Omnium Cie | Reservoir a carburant muni d'un dispositif de mise en communication de ses parties hautes |
JP2001063385A (ja) * | 1999-08-31 | 2001-03-13 | Nissan Motor Co Ltd | フューエルタンク構造 |
US6484741B2 (en) * | 2001-02-26 | 2002-11-26 | Eaton Corporation | Fuel tank vapor vent valve assembly and method of making same |
US6959696B2 (en) * | 2002-04-12 | 2005-11-01 | Briggs & Stratton Corporation | Internal combustion engine evaporative emission control system |
US7086390B2 (en) * | 2004-11-05 | 2006-08-08 | Briggs & Stratton Corporation | Integrated fuel tank and vapor containment system |
US7185640B2 (en) * | 2004-11-05 | 2007-03-06 | Briggs & Stratton Corporation | Integrated fuel tank and vapor containment system |
-
2006
- 2006-02-03 US US11/346,911 patent/US20070017918A1/en not_active Abandoned
- 2006-03-24 CA CA002540943A patent/CA2540943A1/en not_active Abandoned
- 2006-06-30 EP EP06013573A patent/EP1745971A3/de not_active Withdrawn
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6152431A (en) | 1998-05-06 | 2000-11-28 | Tecumseh Products Company | Carburetor having extended prime |
US6499726B2 (en) | 1999-11-04 | 2002-12-31 | Tecumseh Products Company | Engine having carburetor with bridge circuit |
US6513794B2 (en) | 1999-11-04 | 2003-02-04 | Tecumseh Products Company | Engine having carburetor with bridge circuit |
US20040123846A1 (en) | 2002-09-10 | 2004-07-01 | Rado Gordon E. | Emissions control system for small internal combustion engines |
US6953527B2 (en) | 2003-02-17 | 2005-10-11 | Tecumseh Products Company | Fuel tank with water trap |
US20050178368A1 (en) | 2004-02-02 | 2005-08-18 | Donahue Ronald J. | Evaporative emissions control system including a charcoal canister for small internal combustion engines |
US20050274364A1 (en) | 2004-06-14 | 2005-12-15 | Kirk J D | Evaporative emissions control system for small internal combustion engines |
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2013036426A (ja) * | 2011-08-10 | 2013-02-21 | Fuji Heavy Ind Ltd | 燃料タンク及びエンジン |
US20170022859A1 (en) * | 2011-11-03 | 2017-01-26 | Briggs & Stratton Corporation | Vertically storable engine and mower |
GB2509382A (en) * | 2012-11-19 | 2014-07-02 | Castrol Ltd | A deflector to obstruct movement of liquid into a valve of a container for a fluid system in a vehicle |
GB2509382B (en) * | 2012-11-19 | 2020-06-17 | Castrol Ltd | Fluid system |
WO2016066545A1 (de) * | 2014-10-31 | 2016-05-06 | Kautex Textron Gmbh & Co. Kg | Betriebsflüssigkeitsbehälter für ein kfz aus thermoplastischem kunststoff |
CN107107741A (zh) * | 2014-10-31 | 2017-08-29 | 考特克斯·特克斯罗恩有限公司及两合公司 | 热塑性塑料制成的用于机动车辆的工作液体容器 |
US10059195B2 (en) | 2014-10-31 | 2018-08-28 | Kautex Textron Gmbh & Co. Kg | Motor vehicle operating fluid container made of thermoplastic |
CN107107741B (zh) * | 2014-10-31 | 2018-10-19 | 考特克斯·特克斯罗恩有限公司及两合公司 | 热塑性塑料制成的用于机动车辆的工作液体容器 |
WO2016184990A1 (fr) * | 2015-05-19 | 2016-11-24 | Plastic Omnium Advanced Innovation And Research | Reservoir a jupe integree |
FR3036334A1 (fr) * | 2015-05-19 | 2016-11-25 | Inergy Automotive Systems Res (Societe Anonyme) | Reservoir a jupe integree. |
US10730385B2 (en) | 2015-05-19 | 2020-08-04 | Plastic Omnium Advances Innovation and Research | Tank with integrated skirt |
US12085216B2 (en) | 2022-02-17 | 2024-09-10 | Arctic Cat Inc. | Multi-use fuel filler tube |
Also Published As
Publication number | Publication date |
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CA2540943A1 (en) | 2007-01-20 |
US20070017918A1 (en) | 2007-01-25 |
EP1745971A3 (de) | 2008-03-19 |
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